你的这个问题太大了。常用介词随便也有二三十个，如：at, in, on ,beside, by, near, behind, but, except , besides,among, between, from, to, with, without, about, like, into, onto, through,before,against, along, during, for, of, off, past, since, towards, until, within, up, down, per, over, upon,till 等等。而常用介词短语，同样多不胜数。自己平时要善于积累。以in为例，可有：in the morning(afternoon, evening.......)in the sun(rain,snow, wet, dusk......)in danger(peace, poverty, fashion, comfort, blossom......)in fear of(excitement,doubt,hope......)in October(summer, 2005......)in rags(ruins, knots,fun,joke......)in a hurry(circle,line, a queue......)in English(price, length,ink......)in red(white...; short,brief...)简直不胜枚举，就不一一举例了。
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